Window balance

A home owner from Columbia, MD says:
May 5, 2018

Hi, I am looking for a replacement window balance. The metal spring is broken. The windows has a balance on each side. There is no manufacturer label visible. it only has on the upper plastic part an imprint 1:1. Let me know if you have an idea what part this might be. I have two windows that need to be fixed and I would like to order 2 more as backup.

Thanks for your help

Ferdinand

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Tom from SWISCO responded:
May 9, 2018

Hi- thanks so much for posting! 

Based on your photos, it looks like you have our S140-11 Constant Force Balance System. Carefully compare our information to what you have and let us know what you think! 
A quick learner from Columbia says:
May 11, 2018
Thank you for your help. Looks like that is the exact one I need.
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Tom from SWISCO responded:
May 11, 2018

Great! You're welcome.
11 lb Series 140 Quick-Tilt, Dual
11 lb Series 140 Quick-Tilt, Dual
S140-11
$11.45
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